Improvement in mole-plows



HAMMER 8n GORDON.

Mole-Plow.

309 Y P'mzelltegl Feb. 5, 1861.

Inventors:

Witnesses: Mam 4% I 7 %@%MM v w UNITED. STATES PATENT OFFIC J. A. HAMMER AND J. P. GORDON, 0F LISBON,

[ MPROVEMENT IN MOLE-FLOWS.

Specification forming part of Letters Patent No. 3l,3l3, dated February 5, 1861.

To all whom it may concern:

Be it known that we, J. A. HAMMER and J. P. GORDON, both of Lisbon, in the county of Linn and State of Iowa, have invented certain new and useful Improvements in Mole-Flows;

' and we do hereby declare that the following Similar letters of reference in the several figures indicate corresponding parts.

Our invention consists in the arrangement of hinges or joints atthe lower ends of the double colter, in combination with flanges on the top, and with an adjusting-screw for the purpose of raising or depressing the heel or point of the mole, according to the direction which it may be desirable to give to the mole, together with an adjusting-lever and with a guide-pin behind the colter, whereby the upand-down motion of the latter is facilitated.

To enable those skilled in the art to make and use our invention, we will proceed to de-- scribe its construction and operation with reference to the drawings.

The beam A, which is of the ordinary construction, is supported in front by two wheels, B, and in the rear by a grooved wheel, 0.

D is the colter, which passes loosely through a slot in the beam, being suspended from a pin, a, in the end of the adjusting-lever E. The colter D is secured to the mole F by means of a pivot, b, passing through said mole at about the middle of its length, and an additional colter or blade, G, is secured to the heel of the mole by means of a pivot, o. The upper end of this additional colter or blade G is provided with a flange, d, which is perforated, and which slides on the colter D, and a screw, 6, which passes through a flange, f, on the top of the colter D, being confined in its position by two rings, 1 g, and which screws into the flange d, serves to adjust the mole. It will be easily understood how by turning this screw the point of the mole can be raised or depressed, thus giving to said mole a tendency to run upward or downward.

The cross-section of the mole F presents the shape of a V, and the mole is provided with two flanges, It, which project from both sides of the mole, near to its heel, and in such a position that the cross-section of the drain opened by the mole has the form shown in Fig. 2, being ready to receive the tiles or drain-boards. The drain boards or tiles are attached by means of hooks z to a pin, H, which passes through eyes j on the rear edge of the blade, G, so that said drain-boards are drawn in as the mole proceeds through the ground.

If it is desired to run the mole out of the ground, the pin D is withdrawn, and the drain boards or tiles being disengaged remain in the ground and form the top of the drain. If it is desired to run the mole out of the ground, its point is raised by means of the screw 0, and the pin a, which secures the colter D to the end of the lever E, is withdrawn, and the mole will now pass up to the surface of the ground as the plow is drawn forward. In order to facilitate the upward motion of the colter, the latter is confined between a round pin, k, passing through the beam behind the colter, and a friction-roller, Z, in the end of the adjustinglever E.

It is obvious that on drawing the mole through the ground a strain is exerted on the colter which forces the same against the pin k, and if the pin a is withdrawn the upper part of the colter is forced against the frictionroller l, and its ascent is materially facilitated.

The adjusting-lever E is fulcrated in a pivot, m, in the standards I, which are firmly secured to the sides of the beam, and the front end of said colter is adjusted by means of a pinion. J, gearing into a toothed arc, K, and being operated by a crank, L. A notched disk, M, which is rigidly attached to the arbor of the pinion J, and which is arrested by a sliding dog or catch, N, serves to hold the lever E, and with it the colter and mole, in the desired position.

The operation of the colter D is facilitated by a revolving cutter, O, which is arranged in front of said colter, being adjustable in a vertical direction by means of the slotted hanger n, which is secured to the beam in the desired position by means of a set-screw, o. This cutter serves to cutthrough the sod, if such there be, and to open the slot before the colter. and

the grooved rollerO, whichsupportsthe rear end of" the beam," A, moves behind the 'colter and exactly in line with the same, so that by the action of its two edges the slot is compressed and closed near to the surface, so as to prevent sand or'other impurities dropping down into the drain. Thegroovein the'roll'er- Our mole-plow is very strong 'durable in its construction. IIt--is easily operated and adjusted, and all its parts are so constructed that they do not easily get out of repair.

What we claim as new, and desire to secure by. vLetters .Patent, is

The arrangement 'of"'the"col'ter B and blade Gr, both being hinged to the mole by means of pivots band 0; and connected at top by flanges d and f and screw 0, as described, in combination with the lever E and guide-pin k, for thepurpose of aldouble adjustment, as set forth.

J. A. HAMMER.

P. GORDON.

Witnesses: v

-THOMAS CLARK, J; G; RINGER. 

